English verb conjugation
CAN TWINKLE

Regular verb: twinkle - twinkled - twinkled

Affirmation

Simple form	V-ing form
I can twinkle you can twinkle he can twinkle we can twinkle you can twinkle they can twinkle	I can be twinkling you can be twinkling he can be twinkling we can be twinkling you can be twinkling they can be twinkling
Perfect	V-ing perfect
I can have twinkled you can have twinkled he can have twinkled we can have twinkled you can have twinkled they can have twinkled	I can have been twinkling you can have been twinkling he can have been twinkling we can have been twinkling you can have been twinkling they can have been twinkling

Negation

Simple form	V-ing form
I cannot twinkle you cannot twinkle he cannot twinkle we cannot twinkle you cannot twinkle they cannot twinkle	I cannot be twinkling you cannot be twinkling he cannot be twinkling we cannot be twinkling you cannot be twinkling they cannot be twinkling
Perfect	V-ing perfect
I cannot have twinkled you cannot have twinkled he cannot have twinkled we cannot have twinkled you cannot have twinkled they cannot have twinkled	I cannot have been twinkling you cannot have been twinkling he cannot have been twinkling we cannot have been twinkling you cannot have been twinkling they cannot have been twinkling

Interrogative form

Simple form	V-ing form
can I twinkle? can you twinkle? can he twinkle? can we twinkle? can you twinkle? can they twinkle?	can I be twinkling? can you be twinkling? can he be twinkling? can we be twinkling? can you be twinkling? can they be twinkling?
Perfect	V-ing perfect
can I have twinkled? can you have twinkled? can he have twinkled? can we have twinkled? can you have twinkled? can they have twinkled?	can I have been twinkling? can you have been twinkling? can he have been twinkling? can we have been twinkling? can you have been twinkling? can they have been twinkling?

Interro-negative form

Simple form	V-ing form
can I not twinkle? can you not twinkle? can he not twinkle? can we not twinkle? can you not twinkle? can they not twinkle?	can I not be twinkling? can you not be twinkling? can he not be twinkling? can we not be twinkling? can you not be twinkling? can they not be twinkling?
Perfect	V-ing perfect
can I not have twinkled? can you not have twinkled? can he not have twinkled? can we not have twinkled? can you not have twinkled? can they not have twinkled?	can I not have been twinkling? can you not have been twinkling? can he not have been twinkling? can we not have been twinkling? can you not have been twinkling? can they not have been twinkling?